THE PHILOSOPHER'S STONE

The Prophecy of Seven has finally come to pass, & the members of the Argo II have returned to regular, non-war-centered lives. Percy & Annabeth are getting ready for college. Piper & Jason are in high school. Leo & Calypso have arrived at Camp Half-Blood. Frank is thriving as praetor in Camp Jupiter & Hazel as centurion of the Fifth Cohort. Thalia's found a new best friend in Reyna Avila Ramírez-Arellano. Nico had his first kiss with Will Solace a month ago.
But something's wrong. Apollo has disappeared on a quest. The Labyrinth has reappeared after Percy Jackson & his friends fought so hard for it to disappear four years ago. & most worryingly of all, Rachel Dare has been occasionally possessed by some kind of sinister spirit. & she can TELL that the spirit of the Oracle - the mummy oracle in the attic of the Big House - has a prophecy to say.
Meanwhile, in the Wizarding World, trouble is brewing. Harry Potter got his letter from Hogwarts, & he's already made a friend in friendly half-giant Rubeus Hagrid. But unicorns are being found dead in forests. Monsters are appearing in Hogwarts - a place they've never dared to come before. There's a 3-headed-dog on the 3rd floor. & these strange kids have appeared - they've helped Harry, Ron, & Hermione so far, but THREE of them are Slytherins & one of them is awfully chummy with Malfoy. Harry doesn't want to say that these 11 aren't trustworthy, after all the things they've been through together, but a small part of him nags at it, making him wonder...

The Heroes of Olympus have been sent to Hecate's Wizarding World to protect it, & they can't help but be annoyed at these eleven year old kids who know literally nothing at all. But soon, they start warming up to the Golden Trio, & even start helping them out. The problem is, when will the Golden Trio warm up to them?

set in between The Dark Prophecy & The Burning Maze
all characters belong to Rick Riordan & JK Rowling! plot belongs to me :)